That must be it. The fact is when the water hits the top of your head it is, like wurlygirl said, encouraging it to lie flat and since it's shorter you can't show off volume anywhere else. I love root volume as much as anybody else but I think I still need the pressure of the water to get my hair to lie in place since it's so rebellious and wants to tangle. I may try rinsing upside down again though. Maybe the root volume is worth it.
3A - C, HP, ME, HD. (Coarse, High Porosity, Medium Elasticity, High Density.)

CG since Nov. 2012

Poos: SM Moisture Retention + Yucca Baobab, TJ's Tea Tree Tingle
Condish: TJ 'sTea Tree Tingle*, SM Moisture Retention* + Curl & Shine + Yucca Baobab, Yes to Blueberries
Stylers: KCKT*, SM Curl Enhancing Smoothie* + Curl & Style Milk*, KCCC*, FSG*, CJ Pattern Pusha, Curl Keeper
Sealers: Jojoba* or Grapeseed* oil

* = HG